Then can you explain how the coach adjust during the game?
You do bring up a good question.
What impact, if any, does a timeout have on a game?
If anything, I've seen team's come back from a timeout with a little bit more poise, taking a shot that makes more sense for their team rather than lofting up a distant 3 as the shot clock expires.
I don't think that it involves a tactic change, though, but perhaps when a team calls timeout, a small nuance of gameplay is shifted. Something like everyone's experience level goes up a couple points for the next 2 or 3 plays so they make better decisions.